Duplicate objects are created when a library overridden collection has new objects added that are then also overridden. #101679
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Reference: blender/blender#101679
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System Information
Operating system: macOS-12.6-arm64-arm-64bit 64 Bits
Graphics card: Apple M1 Apple 4.1 Metal - 76.3
Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash:
0759f671ce
Worked: (newest version of Blender that worked as expected)
Short description of error
Duplicate objects are being created when new objects that have been added to a collection that is linked to another file are given a library override.
This is a simplified & more refined version of this report: https://developer.blender.org/T101466
Exact steps for others to reproduce the error
duplicate-bug.mp4
"//Data corruption: data-block 'OBAarmature.002' is using another local data-block ('OBArmature.001') as library override reference
Data corruption: data-block 'OBSuzanne.001' is using another local data-block ('OBSuzanne') as library override reference//"
shot-01.blend
props.blend
Added subscriber: @stephenthomas
Added subscriber: @artutava
It's happening here with some rigs. It simply duplicates objects inside the link to the main collection in the scene.
Added subscriber: @iss
Changed status from 'Needs Triage' to: 'Needs User Info'
Following steps strictly I think I need to save file after step 4?
Also I have skipped step 4 and deleted scene content after step 5 after I wasn't able to reproduce for the first time.
I was checking with 3.4 and 3.3 and wasn't able to reproduce exact issue.
Only got info message in info editor:
And error in conole:
ERROR (wm.files): C:\Users\blender\git\blender-vdev\blender.git\source\blender\windowmanager\intern\wm_files.c:869 file_read_reports_finalize: 2 local ObjectData and 0 local Object proxies are reported to be missing, this should never happen
Thanks for your response Richard.
The name of the collection doesn’t really matter, it’s not related to the bug but I thought it might help to understand the context of the bug (e.g. it makes sense that a ‘props’ collection is a collection that can be added to during a production and not be static/locked off). When you create a new file in step 5, it’ll ask you to save anyway.
Deleting everything in the scene shouldn’t make a difference to the bug, but it’s what I do in the screen recording and it’s good practice to keep things clean & organised.
Can I ask what you mean when you say ‘for the first time’? The error only occurs after a collection has been linked into the shot file, then new objects added to the linked collection and a library override is added to the new armature object in the shot file. The first time you create the collection and link it into another file shouldn’t show an error.
If you open the shot file attached to this report, yes, it’ll show the errors. This is the result of the bug along with two versions of Suzanne and the rig she’s attached to. If you’d like to reproduce the bug, follow the steps above, or if you’d like granular detail, the video reproduces the bug from scratch, maybe you could follow along to reproduce?
Can I point you to my original bug report here: https://developer.blender.org/T101466. Don’t worry about me asking if new objects should automatically be overridden, I agree that’s a feature request and shouldn’t be in a bug report. Please focus on Omar confirming the duplicate issue.
Please also see this bug report: https://developer.blender.org/T100428. My original bug report was erroneously merged with this one. You’ll see near the end that Bastien confirms the bug and asks me to create a new bug report.
I saw errors from your file. I just wanted to clarify after I wasn't able to reproduce, I need to construct written steps anyway. will try following the video instead and see what I missed if I can reproduce.
Thanks Richard, let me know if there's anything I can do to help.
Changed status from 'Needs User Info' to: 'Confirmed'
This issue was referenced by
bb95609fce
This issue was referenced by
a379fce14b
Changed status from 'Confirmed' to: 'Resolved'
Amazing, thanks Bastien and Richard, really appreciate it.
@stephenthomas You're much welcome, thanks for reporting the issue. :)